Would depend on my use for the 62 / SS109 projectile. If it's for steel or target use, no way. First, that shiit will jack your steel up. It does leave bigger divots on AR500 plate. The stories are real... You can walk up and look at your plates, and immediately shout, "WHAT ASSHEAD IS SHOOTING GREEN TIPS?!!?" For strictly target use, there are other, better bullets that are cheaper than SS109 projectiles. So, for those two things, nope.
For other uses, barrier use, targets heavily clothed, etc, then hell yeah. Again, there are other projectiles that are better at barrier penetration, or better in terminal ballistics than SS109 - but not for the price you can get it at. So, that's the other range of the spectrum on it, IMHO. It's a great projectile, depending on your intended use, for it's price. It's also weird, due to the steel core - you should be shooting this thing from a 1:7" barrel, because of that, to get it all-around stabile for it's intended use. When you shoot it through a 1:7" twist, it's pretty accurate, when you do your part. You can see the difference in performance of it going through 1:7" and 1:8". For the record, I have a case of SS109 stashed away.
This is the 62gr 5.56 stuff to start finding:
http://bulletin.accurateshooter.com/2010/06/u-s-army-issues-new-m855a1-ammo-to-troops-in-afghanistan/
On the 55gr methodology - I can load up my load of 55gr Hornady FMJ BT and shoot that through my 1:8" Mk12 Mod0 and easily centermass steel silhouettes at 600 yards. The terminal performance might not be there at that distance, but it works for range use and training, and it's cheap, and readily available. For the record, it really starts to SUCK when you try to shoot it at 700 yards. Bad. Anything over 600 yards gets the Hornady 75gr BTHPs launched at it.